drivers/net/bonding/bond_options.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * drivers/net/bond/bond_options.c - bonding options
   4  * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
   5  * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
   6  */
   7
   8 #include <linux/errno.h>
   9 #include <linux/if.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/rcupdate.h>
  13 #include <linux/ctype.h>
  14 #include <linux/inet.h>
  15 #include <linux/sched/signal.h>
  16
  17 #include <net/bonding.h>
  18
  19 static int bond_option_active_slave_set(struct bonding *bond,
  20                                         const struct bond_opt_value *newval);
  21 static int bond_option_miimon_set(struct bonding *bond,
  22                                   const struct bond_opt_value *newval);
  23 static int bond_option_updelay_set(struct bonding *bond,
  24                                    const struct bond_opt_value *newval);
  25 static int bond_option_downdelay_set(struct bonding *bond,
  26                                      const struct bond_opt_value *newval);
  27 static int bond_option_peer_notif_delay_set(struct bonding *bond,
  28                                             const struct bond_opt_value *newval);
  29 static int bond_option_use_carrier_set(struct bonding *bond,
  30                                        const struct bond_opt_value *newval);
  31 static int bond_option_arp_interval_set(struct bonding *bond,
  32                                         const struct bond_opt_value *newval);
  33 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
  34 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
  35 static int bond_option_arp_ip_targets_set(struct bonding *bond,
  36                                           const struct bond_opt_value *newval);
  37 static int bond_option_arp_validate_set(struct bonding *bond,
  38                                         const struct bond_opt_value *newval);
  39 static int bond_option_arp_all_targets_set(struct bonding *bond,
  40                                            const struct bond_opt_value *newval);
  41 static int bond_option_primary_set(struct bonding *bond,
  42                                    const struct bond_opt_value *newval);
  43 static int bond_option_primary_reselect_set(struct bonding *bond,
  44                                             const struct bond_opt_value *newval);
  45 static int bond_option_fail_over_mac_set(struct bonding *bond,
  46                                          const struct bond_opt_value *newval);
  47 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
  48                                             const struct bond_opt_value *newval);
  49 static int bond_option_resend_igmp_set(struct bonding *bond,
  50                                        const struct bond_opt_value *newval);
  51 static int bond_option_num_peer_notif_set(struct bonding *bond,
  52                                           const struct bond_opt_value *newval);
  53 static int bond_option_all_slaves_active_set(struct bonding *bond,
  54                                              const struct bond_opt_value *newval);
  55 static int bond_option_min_links_set(struct bonding *bond,
  56                                      const struct bond_opt_value *newval);
  57 static int bond_option_lp_interval_set(struct bonding *bond,
  58                                        const struct bond_opt_value *newval);
  59 static int bond_option_pps_set(struct bonding *bond,
  60                                const struct bond_opt_value *newval);
  61 static int bond_option_lacp_rate_set(struct bonding *bond,
  62                                      const struct bond_opt_value *newval);
  63 static int bond_option_ad_select_set(struct bonding *bond,
  64                                      const struct bond_opt_value *newval);
  65 static int bond_option_queue_id_set(struct bonding *bond,
  66                                     const struct bond_opt_value *newval);
  67 static int bond_option_mode_set(struct bonding *bond,
  68                                 const struct bond_opt_value *newval);
  69 static int bond_option_slaves_set(struct bonding *bond,
  70                                   const struct bond_opt_value *newval);
  71 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
  72                                   const struct bond_opt_value *newval);
  73 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
  74                                              const struct bond_opt_value *newval);
  75 static int bond_option_ad_actor_system_set(struct bonding *bond,
  76                                            const struct bond_opt_value *newval);
  77 static int bond_option_ad_user_port_key_set(struct bonding *bond,
  78                                             const struct bond_opt_value *newval);
  79
  80
  81 static const struct bond_opt_value bond_mode_tbl[] = {
  82         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  83         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  84         { "balance-xor",   BOND_MODE_XOR,          0},
  85         { "broadcast",     BOND_MODE_BROADCAST,    0},
  86         { "802.3ad",       BOND_MODE_8023AD,       0},
  87         { "balance-tlb",   BOND_MODE_TLB,          0},
  88         { "balance-alb",   BOND_MODE_ALB,          0},
  89         { NULL,            -1,                     0},
  90 };
  91
  92 static const struct bond_opt_value bond_pps_tbl[] = {
  93         { "default", 1,         BOND_VALFLAG_DEFAULT},
  94         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
  95         { NULL,      -1,        0},
  96 };
  97
  98 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
  99         { "layer2",      BOND_XMIT_POLICY_LAYER2,      BOND_VALFLAG_DEFAULT},
 100         { "layer3+4",    BOND_XMIT_POLICY_LAYER34,     0},
 101         { "layer2+3",    BOND_XMIT_POLICY_LAYER23,     0},
 102         { "encap2+3",    BOND_XMIT_POLICY_ENCAP23,     0},
 103         { "encap3+4",    BOND_XMIT_POLICY_ENCAP34,     0},
 104         { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},
 105         { NULL,          -1,                           0},
 106 };
 107
 108 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 109         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 110         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 111         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 112         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 113         { "filter",             BOND_ARP_FILTER,                0},
 114         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 115         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 116         { NULL,                 -1,                             0},
 117 };
 118
 119 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 120         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 121         { "all", BOND_ARP_TARGETS_ALL, 0},
 122         { NULL,  -1,                   0},
 123 };
 124
 125 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 126         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 127         { "active", BOND_FOM_ACTIVE, 0},
 128         { "follow", BOND_FOM_FOLLOW, 0},
 129         { NULL,     -1,              0},
 130 };
 131
 132 static const struct bond_opt_value bond_intmax_tbl[] = {
 133         { "off",     0,       BOND_VALFLAG_DEFAULT},
 134         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 135         { NULL,      -1,      0}
 136 };
 137
 138 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 139         { "slow", AD_LACP_SLOW, 0},
 140         { "fast", AD_LACP_FAST, 0},
 141         { NULL,   -1,           0},
 142 };
 143
 144 static const struct bond_opt_value bond_ad_select_tbl[] = {
 145         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 146         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 147         { "count",     BOND_AD_COUNT,     0},
 148         { NULL,        -1,                0},
 149 };
 150
 151 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 152         { "off",     0,   0},
 153         { "maxval",  255, BOND_VALFLAG_MAX},
 154         { "default", 1,   BOND_VALFLAG_DEFAULT},
 155         { NULL,      -1,  0}
 156 };
 157
 158 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 159         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 160         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 161         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 162         { NULL,      -1},
 163 };
 164
 165 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 166         { "off", 0,  0},
 167         { "on",  1,  BOND_VALFLAG_DEFAULT},
 168         { NULL,  -1, 0}
 169 };
 170
 171 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 172         { "off", 0,  BOND_VALFLAG_DEFAULT},
 173         { "on",  1,  0},
 174         { NULL,  -1, 0}
 175 };
 176
 177 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 178         { "off",     0,   0},
 179         { "maxval",  255, BOND_VALFLAG_MAX},
 180         { "default", 1,   BOND_VALFLAG_DEFAULT},
 181         { NULL,      -1,  0}
 182 };
 183
 184 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 185         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 186         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 187         { NULL,      -1,      0},
 188 };
 189
 190 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 191         { "off", 0,  0},
 192         { "on",  1,  BOND_VALFLAG_DEFAULT},
 193         { NULL,  -1, 0}
 194 };
 195
 196 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
 197         { "minval",  1,     BOND_VALFLAG_MIN},
 198         { "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
 199         { NULL,      -1,    0},
 200 };
 201
 202 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
 203         { "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 204         { "maxval",  1023,  BOND_VALFLAG_MAX},
 205         { NULL,      -1,    0},
 206 };
 207
 208 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
 209         [BOND_OPT_MODE] = {
 210                 .id = BOND_OPT_MODE,
 211                 .name = "mode",
 212                 .desc = "bond device mode",
 213                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 214                 .values = bond_mode_tbl,
 215                 .set = bond_option_mode_set
 216         },
 217         [BOND_OPT_PACKETS_PER_SLAVE] = {
 218                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 219                 .name = "packets_per_slave",
 220                 .desc = "Packets to send per slave in RR mode",
 221                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 222                 .values = bond_pps_tbl,
 223                 .set = bond_option_pps_set
 224         },
 225         [BOND_OPT_XMIT_HASH] = {
 226                 .id = BOND_OPT_XMIT_HASH,
 227                 .name = "xmit_hash_policy",
 228                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 229                 .values = bond_xmit_hashtype_tbl,
 230                 .set = bond_option_xmit_hash_policy_set
 231         },
 232         [BOND_OPT_ARP_VALIDATE] = {
 233                 .id = BOND_OPT_ARP_VALIDATE,
 234                 .name = "arp_validate",
 235                 .desc = "validate src/dst of ARP probes",
 236                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 237                                BIT(BOND_MODE_ALB),
 238                 .values = bond_arp_validate_tbl,
 239                 .set = bond_option_arp_validate_set
 240         },
 241         [BOND_OPT_ARP_ALL_TARGETS] = {
 242                 .id = BOND_OPT_ARP_ALL_TARGETS,
 243                 .name = "arp_all_targets",
 244                 .desc = "fail on any/all arp targets timeout",
 245                 .values = bond_arp_all_targets_tbl,
 246                 .set = bond_option_arp_all_targets_set
 247         },
 248         [BOND_OPT_FAIL_OVER_MAC] = {
 249                 .id = BOND_OPT_FAIL_OVER_MAC,
 250                 .name = "fail_over_mac",
 251                 .desc = "For active-backup, do not set all slaves to the same MAC",
 252                 .flags = BOND_OPTFLAG_NOSLAVES,
 253                 .values = bond_fail_over_mac_tbl,
 254                 .set = bond_option_fail_over_mac_set
 255         },
 256         [BOND_OPT_ARP_INTERVAL] = {
 257                 .id = BOND_OPT_ARP_INTERVAL,
 258                 .name = "arp_interval",
 259                 .desc = "arp interval in milliseconds",
 260                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 261                                BIT(BOND_MODE_ALB),
 262                 .values = bond_intmax_tbl,
 263                 .set = bond_option_arp_interval_set
 264         },
 265         [BOND_OPT_ARP_TARGETS] = {
 266                 .id = BOND_OPT_ARP_TARGETS,
 267                 .name = "arp_ip_target",
 268                 .desc = "arp targets in n.n.n.n form",
 269                 .flags = BOND_OPTFLAG_RAWVAL,
 270                 .set = bond_option_arp_ip_targets_set
 271         },
 272         [BOND_OPT_DOWNDELAY] = {
 273                 .id = BOND_OPT_DOWNDELAY,
 274                 .name = "downdelay",
 275                 .desc = "Delay before considering link down, in milliseconds",
 276                 .values = bond_intmax_tbl,
 277                 .set = bond_option_downdelay_set
 278         },
 279         [BOND_OPT_UPDELAY] = {
 280                 .id = BOND_OPT_UPDELAY,
 281                 .name = "updelay",
 282                 .desc = "Delay before considering link up, in milliseconds",
 283                 .values = bond_intmax_tbl,
 284                 .set = bond_option_updelay_set
 285         },
 286         [BOND_OPT_LACP_RATE] = {
 287                 .id = BOND_OPT_LACP_RATE,
 288                 .name = "lacp_rate",
 289                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 290                 .flags = BOND_OPTFLAG_IFDOWN,
 291                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 292                 .values = bond_lacp_rate_tbl,
 293                 .set = bond_option_lacp_rate_set
 294         },
 295         [BOND_OPT_MINLINKS] = {
 296                 .id = BOND_OPT_MINLINKS,
 297                 .name = "min_links",
 298                 .desc = "Minimum number of available links before turning on carrier",
 299                 .values = bond_intmax_tbl,
 300                 .set = bond_option_min_links_set
 301         },
 302         [BOND_OPT_AD_SELECT] = {
 303                 .id = BOND_OPT_AD_SELECT,
 304                 .name = "ad_select",
 305                 .desc = "803.ad aggregation selection logic",
 306                 .flags = BOND_OPTFLAG_IFDOWN,
 307                 .values = bond_ad_select_tbl,
 308                 .set = bond_option_ad_select_set
 309         },
 310         [BOND_OPT_NUM_PEER_NOTIF] = {
 311                 .id = BOND_OPT_NUM_PEER_NOTIF,
 312                 .name = "num_unsol_na",
 313                 .desc = "Number of peer notifications to send on failover event",
 314                 .values = bond_num_peer_notif_tbl,
 315                 .set = bond_option_num_peer_notif_set
 316         },
 317         [BOND_OPT_MIIMON] = {
 318                 .id = BOND_OPT_MIIMON,
 319                 .name = "miimon",
 320                 .desc = "Link check interval in milliseconds",
 321                 .values = bond_intmax_tbl,
 322                 .set = bond_option_miimon_set
 323         },
 324         [BOND_OPT_PRIMARY] = {
 325                 .id = BOND_OPT_PRIMARY,
 326                 .name = "primary",
 327                 .desc = "Primary network device to use",
 328                 .flags = BOND_OPTFLAG_RAWVAL,
 329                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 330                                                 BIT(BOND_MODE_TLB) |
 331                                                 BIT(BOND_MODE_ALB)),
 332                 .set = bond_option_primary_set
 333         },
 334         [BOND_OPT_PRIMARY_RESELECT] = {
 335                 .id = BOND_OPT_PRIMARY_RESELECT,
 336                 .name = "primary_reselect",
 337                 .desc = "Reselect primary slave once it comes up",
 338                 .values = bond_primary_reselect_tbl,
 339                 .set = bond_option_primary_reselect_set
 340         },
 341         [BOND_OPT_USE_CARRIER] = {
 342                 .id = BOND_OPT_USE_CARRIER,
 343                 .name = "use_carrier",
 344                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 345                 .values = bond_use_carrier_tbl,
 346                 .set = bond_option_use_carrier_set
 347         },
 348         [BOND_OPT_ACTIVE_SLAVE] = {
 349                 .id = BOND_OPT_ACTIVE_SLAVE,
 350                 .name = "active_slave",
 351                 .desc = "Currently active slave",
 352                 .flags = BOND_OPTFLAG_RAWVAL,
 353                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 354                                                 BIT(BOND_MODE_TLB) |
 355                                                 BIT(BOND_MODE_ALB)),
 356                 .set = bond_option_active_slave_set
 357         },
 358         [BOND_OPT_QUEUE_ID] = {
 359                 .id = BOND_OPT_QUEUE_ID,
 360                 .name = "queue_id",
 361                 .desc = "Set queue id of a slave",
 362                 .flags = BOND_OPTFLAG_RAWVAL,
 363                 .set = bond_option_queue_id_set
 364         },
 365         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 366                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 367                 .name = "all_slaves_active",
 368                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 369                 .values = bond_all_slaves_active_tbl,
 370                 .set = bond_option_all_slaves_active_set
 371         },
 372         [BOND_OPT_RESEND_IGMP] = {
 373                 .id = BOND_OPT_RESEND_IGMP,
 374                 .name = "resend_igmp",
 375                 .desc = "Number of IGMP membership reports to send on link failure",
 376                 .values = bond_resend_igmp_tbl,
 377                 .set = bond_option_resend_igmp_set
 378         },
 379         [BOND_OPT_LP_INTERVAL] = {
 380                 .id = BOND_OPT_LP_INTERVAL,
 381                 .name = "lp_interval",
 382                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 383                 .values = bond_lp_interval_tbl,
 384                 .set = bond_option_lp_interval_set
 385         },
 386         [BOND_OPT_SLAVES] = {
 387                 .id = BOND_OPT_SLAVES,
 388                 .name = "slaves",
 389                 .desc = "Slave membership management",
 390                 .flags = BOND_OPTFLAG_RAWVAL,
 391                 .set = bond_option_slaves_set
 392         },
 393         [BOND_OPT_TLB_DYNAMIC_LB] = {
 394                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 395                 .name = "tlb_dynamic_lb",
 396                 .desc = "Enable dynamic flow shuffling",
 397                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
 398                 .values = bond_tlb_dynamic_lb_tbl,
 399                 .flags = BOND_OPTFLAG_IFDOWN,
 400                 .set = bond_option_tlb_dynamic_lb_set,
 401         },
 402         [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
 403                 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
 404                 .name = "ad_actor_sys_prio",
 405                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 406                 .values = bond_ad_actor_sys_prio_tbl,
 407                 .set = bond_option_ad_actor_sys_prio_set,
 408         },
 409         [BOND_OPT_AD_ACTOR_SYSTEM] = {
 410                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
 411                 .name = "ad_actor_system",
 412                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 413                 .flags = BOND_OPTFLAG_RAWVAL,
 414                 .set = bond_option_ad_actor_system_set,
 415         },
 416         [BOND_OPT_AD_USER_PORT_KEY] = {
 417                 .id = BOND_OPT_AD_USER_PORT_KEY,
 418                 .name = "ad_user_port_key",
 419                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 420                 .flags = BOND_OPTFLAG_IFDOWN,
 421                 .values = bond_ad_user_port_key_tbl,
 422                 .set = bond_option_ad_user_port_key_set,
 423         },
 424         [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
 425                 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
 426                 .name = "num_grat_arp",
 427                 .desc = "Number of peer notifications to send on failover event",
 428                 .values = bond_num_peer_notif_tbl,
 429                 .set = bond_option_num_peer_notif_set
 430         },
 431         [BOND_OPT_PEER_NOTIF_DELAY] = {
 432                 .id = BOND_OPT_PEER_NOTIF_DELAY,
 433                 .name = "peer_notif_delay",
 434                 .desc = "Delay between each peer notification on failover event, in milliseconds",
 435                 .values = bond_intmax_tbl,
 436                 .set = bond_option_peer_notif_delay_set
 437         }
 438 };
 439
 440 /* Searches for an option by name */
 441 const struct bond_option *bond_opt_get_by_name(const char *name)
 442 {
 443         const struct bond_option *opt;
 444         int option;
 445
 446         for (option = 0; option < BOND_OPT_LAST; option++) {
 447                 opt = bond_opt_get(option);
 448                 if (opt && !strcmp(opt->name, name))
 449                         return opt;
 450         }
 451
 452         return NULL;
 453 }
 454
 455 /* Searches for a value in opt's values[] table */
 456 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 457 {
 458         const struct bond_option *opt;
 459         int i;
 460
 461         opt = bond_opt_get(option);
 462         if (WARN_ON(!opt))
 463                 return NULL;
 464         for (i = 0; opt->values && opt->values[i].string; i++)
 465                 if (opt->values[i].value == val)
 466                         return &opt->values[i];
 467
 468         return NULL;
 469 }
 470
 471 /* Searches for a value in opt's values[] table which matches the flagmask */
 472 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 473                                                        u32 flagmask)
 474 {
 475         int i;
 476
 477         for (i = 0; opt->values && opt->values[i].string; i++)
 478                 if (opt->values[i].flags & flagmask)
 479                         return &opt->values[i];
 480
 481         return NULL;
 482 }
 483
 484 /* If maxval is missing then there's no range to check. In case minval is
 485  * missing then it's considered to be 0.
 486  */
 487 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 488 {
 489         const struct bond_opt_value *minval, *maxval;
 490
 491         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 492         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 493         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 494                 return false;
 495
 496         return true;
 497 }
 498
 499 /**
 500  * bond_opt_parse - parse option value
 501  * @opt: the option to parse against
 502  * @val: value to parse
 503  *
 504  * This function tries to extract the value from @val and check if it's
 505  * a possible match for the option and returns NULL if a match isn't found,
 506  * or the struct_opt_value that matched. It also strips the new line from
 507  * @val->string if it's present.
 508  */
 509 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 510                                             struct bond_opt_value *val)
 511 {
 512         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 513         const struct bond_opt_value *tbl;
 514         const struct bond_opt_value *ret = NULL;
 515         bool checkval;
 516         int i, rv;
 517
 518         /* No parsing if the option wants a raw val */
 519         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 520                 return val;
 521
 522         tbl = opt->values;
 523         if (!tbl)
 524                 goto out;
 525
 526         /* ULLONG_MAX is used to bypass string processing */
 527         checkval = val->value != ULLONG_MAX;
 528         if (!checkval) {
 529                 if (!val->string)
 530                         goto out;
 531                 p = strchr(val->string, '\n');
 532                 if (p)
 533                         *p = '\0';
 534                 for (p = val->string; *p; p++)
 535                         if (!(isdigit(*p) || isspace(*p)))
 536                                 break;
 537                 /* The following code extracts the string to match or the value
 538                  * and sets checkval appropriately
 539                  */
 540                 if (*p) {
 541                         rv = sscanf(val->string, "%32s", valstr);
 542                 } else {
 543                         rv = sscanf(val->string, "%llu", &val->value);
 544                         checkval = true;
 545                 }
 546                 if (!rv)
 547                         goto out;
 548         }
 549
 550         for (i = 0; tbl[i].string; i++) {
 551                 /* Check for exact match */
 552                 if (checkval) {
 553                         if (val->value == tbl[i].value)
 554                                 ret = &tbl[i];
 555                 } else {
 556                         if (!strcmp(valstr, "default") &&
 557                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 558                                 ret = &tbl[i];
 559
 560                         if (!strcmp(valstr, tbl[i].string))
 561                                 ret = &tbl[i];
 562                 }
 563                 /* Found an exact match */
 564                 if (ret)
 565                         goto out;
 566         }
 567         /* Possible range match */
 568         if (checkval && bond_opt_check_range(opt, val->value))
 569                 ret = val;
 570 out:
 571         return ret;
 572 }
 573
 574 /* Check opt's dependencies against bond mode and currently set options */
 575 static int bond_opt_check_deps(struct bonding *bond,
 576                                const struct bond_option *opt)
 577 {
 578         struct bond_params *params = &bond->params;
 579
 580         if (test_bit(params->mode, &opt->unsuppmodes))
 581                 return -EACCES;
 582         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 583                 return -ENOTEMPTY;
 584         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 585                 return -EBUSY;
 586
 587         return 0;
 588 }
 589
 590 static void bond_opt_dep_print(struct bonding *bond,
 591                                const struct bond_option *opt)
 592 {
 593         const struct bond_opt_value *modeval;
 594         struct bond_params *params;
 595
 596         params = &bond->params;
 597         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 598         if (test_bit(params->mode, &opt->unsuppmodes))
 599                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 600                            opt->name, modeval->string, modeval->value);
 601 }
 602
 603 static void bond_opt_error_interpret(struct bonding *bond,
 604                                      const struct bond_option *opt,
 605                                      int error, const struct bond_opt_value *val)
 606 {
 607         const struct bond_opt_value *minval, *maxval;
 608         char *p;
 609
 610         switch (error) {
 611         case -EINVAL:
 612                 if (val) {
 613                         if (val->string) {
 614                                 /* sometimes RAWVAL opts may have new lines */
 615                                 p = strchr(val->string, '\n');
 616                                 if (p)
 617                                         *p = '\0';
 618                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 619                                            opt->name, val->string);
 620                         } else {
 621                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 622                                            opt->name, val->value);
 623                         }
 624                 }
 625                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 626                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 627                 if (!maxval)
 628                         break;
 629                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 630                            opt->name, minval ? minval->value : 0, maxval->value);
 631                 break;
 632         case -EACCES:
 633                 bond_opt_dep_print(bond, opt);
 634                 break;
 635         case -ENOTEMPTY:
 636                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 637                            opt->name);
 638                 break;
 639         case -EBUSY:
 640                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 641                            opt->name);
 642                 break;
 643         case -ENODEV:
 644                 if (val && val->string) {
 645                         p = strchr(val->string, '\n');
 646                         if (p)
 647                                 *p = '\0';
 648                         netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
 649                                    opt->name, val->string);
 650                 }
 651                 break;
 652         default:
 653                 break;
 654         }
 655 }
 656
 657 /**
 658  * __bond_opt_set - set a bonding option
 659  * @bond: target bond device
 660  * @option: option to set
 661  * @val: value to set it to
 662  *
 663  * This function is used to change the bond's option value, it can be
 664  * used for both enabling/changing an option and for disabling it. RTNL lock
 665  * must be obtained before calling this function.
 666  */
 667 int __bond_opt_set(struct bonding *bond,
 668                    unsigned int option, struct bond_opt_value *val)
 669 {
 670         const struct bond_opt_value *retval = NULL;
 671         const struct bond_option *opt;
 672         int ret = -ENOENT;
 673
 674         ASSERT_RTNL();
 675
 676         opt = bond_opt_get(option);
 677         if (WARN_ON(!val) || WARN_ON(!opt))
 678                 goto out;
 679         ret = bond_opt_check_deps(bond, opt);
 680         if (ret)
 681                 goto out;
 682         retval = bond_opt_parse(opt, val);
 683         if (!retval) {
 684                 ret = -EINVAL;
 685                 goto out;
 686         }
 687         ret = opt->set(bond, retval);
 688 out:
 689         if (ret)
 690                 bond_opt_error_interpret(bond, opt, ret, val);
 691
 692         return ret;
 693 }
 694 /**
 695  * __bond_opt_set_notify - set a bonding option
 696  * @bond: target bond device
 697  * @option: option to set
 698  * @val: value to set it to
 699  *
 700  * This function is used to change the bond's option value and trigger
 701  * a notification to user sapce. It can be used for both enabling/changing
 702  * an option and for disabling it. RTNL lock must be obtained before calling
 703  * this function.
 704  */
 705 int __bond_opt_set_notify(struct bonding *bond,
 706                           unsigned int option, struct bond_opt_value *val)
 707 {
 708         int ret = -ENOENT;
 709
 710         ASSERT_RTNL();
 711
 712         ret = __bond_opt_set(bond, option, val);
 713
 714         if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
 715                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 716
 717         return ret;
 718 }
 719
 720 /**
 721  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 722  * @bond: target bond device
 723  * @option: option to set
 724  * @buf: value to set it to
 725  *
 726  * This function tries to acquire RTNL without blocking and if successful
 727  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 728  */
 729 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 730 {
 731         struct bond_opt_value optval;
 732         int ret;
 733
 734         if (!rtnl_trylock())
 735                 return restart_syscall();
 736         bond_opt_initstr(&optval, buf);
 737         ret = __bond_opt_set_notify(bond, option, &optval);
 738         rtnl_unlock();
 739
 740         return ret;
 741 }
 742
 743 /**
 744  * bond_opt_get - get a pointer to an option
 745  * @option: option for which to return a pointer
 746  *
 747  * This function checks if option is valid and if so returns a pointer
 748  * to its entry in the bond_opts[] option array.
 749  */
 750 const struct bond_option *bond_opt_get(unsigned int option)
 751 {
 752         if (!BOND_OPT_VALID(option))
 753                 return NULL;
 754
 755         return &bond_opts[option];
 756 }
 757
 758 static bool bond_set_xfrm_features(struct bonding *bond)
 759 {
 760         if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
 761                 return false;
 762
 763         if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
 764                 bond->dev->wanted_features |= BOND_XFRM_FEATURES;
 765         else
 766                 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
 767
 768         return true;
 769 }
 770
 771 static bool bond_set_tls_features(struct bonding *bond)
 772 {
 773         if (!IS_ENABLED(CONFIG_TLS_DEVICE))
 774                 return false;
 775
 776         if (bond_sk_check(bond))
 777                 bond->dev->wanted_features |= BOND_TLS_FEATURES;
 778         else
 779                 bond->dev->wanted_features &= ~BOND_TLS_FEATURES;
 780
 781         return true;
 782 }
 783
 784 static int bond_option_mode_set(struct bonding *bond,
 785                                 const struct bond_opt_value *newval)
 786 {
 787         if (!bond_mode_uses_arp(newval->value)) {
 788                 if (bond->params.arp_interval) {
 789                         netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 790                                    newval->string);
 791                         /* disable arp monitoring */
 792                         bond->params.arp_interval = 0;
 793                 }
 794
 795                 if (!bond->params.miimon) {
 796                         /* set miimon to default value */
 797                         bond->params.miimon = BOND_DEFAULT_MIIMON;
 798                         netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
 799                                    bond->params.miimon);
 800                 }
 801         }
 802
 803         if (newval->value == BOND_MODE_ALB)
 804                 bond->params.tlb_dynamic_lb = 1;
 805
 806         /* don't cache arp_validate between modes */
 807         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 808         bond->params.mode = newval->value;
 809
 810         if (bond->dev->reg_state == NETREG_REGISTERED) {
 811                 bool update = false;
 812
 813                 update |= bond_set_xfrm_features(bond);
 814                 update |= bond_set_tls_features(bond);
 815
 816                 if (update)
 817                         netdev_update_features(bond->dev);
 818         }
 819
 820         return 0;
 821 }
 822
 823 static int bond_option_active_slave_set(struct bonding *bond,
 824                                         const struct bond_opt_value *newval)
 825 {
 826         char ifname[IFNAMSIZ] = { 0, };
 827         struct net_device *slave_dev;
 828         int ret = 0;
 829
 830         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 831         if (!strlen(ifname) || newval->string[0] == '\n') {
 832                 slave_dev = NULL;
 833         } else {
 834                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 835                 if (!slave_dev)
 836                         return -ENODEV;
 837         }
 838
 839         if (slave_dev) {
 840                 if (!netif_is_bond_slave(slave_dev)) {
 841                         slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
 842                         return -EINVAL;
 843                 }
 844
 845                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 846                         slave_err(bond->dev, slave_dev, "Device is not our slave\n");
 847                         return -EINVAL;
 848                 }
 849         }
 850
 851         block_netpoll_tx();
 852         /* check to see if we are clearing active */
 853         if (!slave_dev) {
 854                 netdev_dbg(bond->dev, "Clearing current active slave\n");
 855                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 856                 bond_select_active_slave(bond);
 857         } else {
 858                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 859                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 860
 861                 BUG_ON(!new_active);
 862
 863                 if (new_active == old_active) {
 864                         /* do nothing */
 865                         slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
 866                 } else {
 867                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 868                             bond_slave_is_up(new_active)) {
 869                                 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
 870                                 bond_change_active_slave(bond, new_active);
 871                         } else {
 872                                 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
 873                                           new_active->dev->name);
 874                                 ret = -EINVAL;
 875                         }
 876                 }
 877         }
 878         unblock_netpoll_tx();
 879
 880         return ret;
 881 }
 882
 883 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 884  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 885  * start it.
 886  */
 887 static int bond_option_miimon_set(struct bonding *bond,
 888                                   const struct bond_opt_value *newval)
 889 {
 890         netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
 891                    newval->value);
 892         bond->params.miimon = newval->value;
 893         if (bond->params.updelay)
 894                 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 895                            bond->params.updelay * bond->params.miimon);
 896         if (bond->params.downdelay)
 897                 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 898                            bond->params.downdelay * bond->params.miimon);
 899         if (bond->params.peer_notif_delay)
 900                 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
 901                            bond->params.peer_notif_delay * bond->params.miimon);
 902         if (newval->value && bond->params.arp_interval) {
 903                 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 904                 bond->params.arp_interval = 0;
 905                 if (bond->params.arp_validate)
 906                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 907         }
 908         if (bond->dev->flags & IFF_UP) {
 909                 /* If the interface is up, we may need to fire off
 910                  * the MII timer. If the interface is down, the
 911                  * timer will get fired off when the open function
 912                  * is called.
 913                  */
 914                 if (!newval->value) {
 915                         cancel_delayed_work_sync(&bond->mii_work);
 916                 } else {
 917                         cancel_delayed_work_sync(&bond->arp_work);
 918                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 919                 }
 920         }
 921
 922         return 0;
 923 }
 924
 925 /* Set up, down and peer notification delays. These must be multiples
 926  * of the MII monitoring value, and are stored internally as the
 927  * multiplier. Thus, we must translate to MS for the real world.
 928  */
 929 static int _bond_option_delay_set(struct bonding *bond,
 930                                   const struct bond_opt_value *newval,
 931                                   const char *name,
 932                                   int *target)
 933 {
 934         int value = newval->value;
 935
 936         if (!bond->params.miimon) {
 937                 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
 938                            name);
 939                 return -EPERM;
 940         }
 941         if ((value % bond->params.miimon) != 0) {
 942                 netdev_warn(bond->dev,
 943                             "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
 944                             name,
 945                             value, bond->params.miimon,
 946                             (value / bond->params.miimon) *
 947                             bond->params.miimon);
 948         }
 949         *target = value / bond->params.miimon;
 950         netdev_dbg(bond->dev, "Setting %s to %d\n",
 951                    name,
 952                    *target * bond->params.miimon);
 953
 954         return 0;
 955 }
 956
 957 static int bond_option_updelay_set(struct bonding *bond,
 958                                    const struct bond_opt_value *newval)
 959 {
 960         return _bond_option_delay_set(bond, newval, "up delay",
 961                                       &bond->params.updelay);
 962 }
 963
 964 static int bond_option_downdelay_set(struct bonding *bond,
 965                                      const struct bond_opt_value *newval)
 966 {
 967         return _bond_option_delay_set(bond, newval, "down delay",
 968                                       &bond->params.downdelay);
 969 }
 970
 971 static int bond_option_peer_notif_delay_set(struct bonding *bond,
 972                                             const struct bond_opt_value *newval)
 973 {
 974         int ret = _bond_option_delay_set(bond, newval,
 975                                          "peer notification delay",
 976                                          &bond->params.peer_notif_delay);
 977         return ret;
 978 }
 979
 980 static int bond_option_use_carrier_set(struct bonding *bond,
 981                                        const struct bond_opt_value *newval)
 982 {
 983         netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
 984                    newval->value);
 985         bond->params.use_carrier = newval->value;
 986
 987         return 0;
 988 }
 989
 990 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 991  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 992  * we must start it.
 993  */
 994 static int bond_option_arp_interval_set(struct bonding *bond,
 995                                         const struct bond_opt_value *newval)
 996 {
 997         netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
 998                    newval->value);
 999         bond->params.arp_interval = newval->value;
1000         if (newval->value) {
1001                 if (bond->params.miimon) {
1002                         netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1003                         bond->params.miimon = 0;
1004                 }
1005                 if (!bond->params.arp_targets[0])
1006                         netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1007         }
1008         if (bond->dev->flags & IFF_UP) {
1009                 /* If the interface is up, we may need to fire off
1010                  * the ARP timer.  If the interface is down, the
1011                  * timer will get fired off when the open function
1012                  * is called.
1013                  */
1014                 if (!newval->value) {
1015                         if (bond->params.arp_validate)
1016                                 bond->recv_probe = NULL;
1017                         cancel_delayed_work_sync(&bond->arp_work);
1018                 } else {
1019                         /* arp_validate can be set only in active-backup mode */
1020                         bond->recv_probe = bond_arp_rcv;
1021                         cancel_delayed_work_sync(&bond->mii_work);
1022                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
1023                 }
1024         }
1025
1026         return 0;
1027 }
1028
1029 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1030                                             __be32 target,
1031                                             unsigned long last_rx)
1032 {
1033         __be32 *targets = bond->params.arp_targets;
1034         struct list_head *iter;
1035         struct slave *slave;
1036
1037         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1038                 bond_for_each_slave(bond, slave, iter)
1039                         slave->target_last_arp_rx[slot] = last_rx;
1040                 targets[slot] = target;
1041         }
1042 }
1043
1044 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1045 {
1046         __be32 *targets = bond->params.arp_targets;
1047         int ind;
1048
1049         if (!bond_is_ip_target_ok(target)) {
1050                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1051                            &target);
1052                 return -EINVAL;
1053         }
1054
1055         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1056                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1057                            &target);
1058                 return -EINVAL;
1059         }
1060
1061         ind = bond_get_targets_ip(targets, 0); /* first free slot */
1062         if (ind == -1) {
1063                 netdev_err(bond->dev, "ARP target table is full!\n");
1064                 return -EINVAL;
1065         }
1066
1067         netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1068
1069         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1070
1071         return 0;
1072 }
1073
1074 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1075 {
1076         return _bond_option_arp_ip_target_add(bond, target);
1077 }
1078
1079 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1080 {
1081         __be32 *targets = bond->params.arp_targets;
1082         struct list_head *iter;
1083         struct slave *slave;
1084         unsigned long *targets_rx;
1085         int ind, i;
1086
1087         if (!bond_is_ip_target_ok(target)) {
1088                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1089                            &target);
1090                 return -EINVAL;
1091         }
1092
1093         ind = bond_get_targets_ip(targets, target);
1094         if (ind == -1) {
1095                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1096                            &target);
1097                 return -EINVAL;
1098         }
1099
1100         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1101                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1102
1103         netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1104
1105         bond_for_each_slave(bond, slave, iter) {
1106                 targets_rx = slave->target_last_arp_rx;
1107                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1108                         targets_rx[i] = targets_rx[i+1];
1109                 targets_rx[i] = 0;
1110         }
1111         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1112                 targets[i] = targets[i+1];
1113         targets[i] = 0;
1114
1115         return 0;
1116 }
1117
1118 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1119 {
1120         int i;
1121
1122         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1123                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1124 }
1125
1126 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1127                                           const struct bond_opt_value *newval)
1128 {
1129         int ret = -EPERM;
1130         __be32 target;
1131
1132         if (newval->string) {
1133                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1134                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1135                                    &target);
1136                         return ret;
1137                 }
1138                 if (newval->string[0] == '+')
1139                         ret = bond_option_arp_ip_target_add(bond, target);
1140                 else if (newval->string[0] == '-')
1141                         ret = bond_option_arp_ip_target_rem(bond, target);
1142                 else
1143                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1144         } else {
1145                 target = newval->value;
1146                 ret = bond_option_arp_ip_target_add(bond, target);
1147         }
1148
1149         return ret;
1150 }
1151
1152 static int bond_option_arp_validate_set(struct bonding *bond,
1153                                         const struct bond_opt_value *newval)
1154 {
1155         netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1156                    newval->string, newval->value);
1157         bond->params.arp_validate = newval->value;
1158
1159         return 0;
1160 }
1161
1162 static int bond_option_arp_all_targets_set(struct bonding *bond,
1163                                            const struct bond_opt_value *newval)
1164 {
1165         netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1166                    newval->string, newval->value);
1167         bond->params.arp_all_targets = newval->value;
1168
1169         return 0;
1170 }
1171
1172 static int bond_option_primary_set(struct bonding *bond,
1173                                    const struct bond_opt_value *newval)
1174 {
1175         char *p, *primary = newval->string;
1176         struct list_head *iter;
1177         struct slave *slave;
1178
1179         block_netpoll_tx();
1180
1181         p = strchr(primary, '\n');
1182         if (p)
1183                 *p = '\0';
1184         /* check to see if we are clearing primary */
1185         if (!strlen(primary)) {
1186                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1187                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1188                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1189                 bond_select_active_slave(bond);
1190                 goto out;
1191         }
1192
1193         bond_for_each_slave(bond, slave, iter) {
1194                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1195                         slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1196                         rcu_assign_pointer(bond->primary_slave, slave);
1197                         strcpy(bond->params.primary, slave->dev->name);
1198                         bond->force_primary = true;
1199                         bond_select_active_slave(bond);
1200                         goto out;
1201                 }
1202         }
1203
1204         if (rtnl_dereference(bond->primary_slave)) {
1205                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1206                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1207                 bond_select_active_slave(bond);
1208         }
1209         strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1210
1211         netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1212                    primary);
1213
1214 out:
1215         unblock_netpoll_tx();
1216
1217         return 0;
1218 }
1219
1220 static int bond_option_primary_reselect_set(struct bonding *bond,
1221                                             const struct bond_opt_value *newval)
1222 {
1223         netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1224                    newval->string, newval->value);
1225         bond->params.primary_reselect = newval->value;
1226
1227         block_netpoll_tx();
1228         bond_select_active_slave(bond);
1229         unblock_netpoll_tx();
1230
1231         return 0;
1232 }
1233
1234 static int bond_option_fail_over_mac_set(struct bonding *bond,
1235                                          const struct bond_opt_value *newval)
1236 {
1237         netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1238                    newval->string, newval->value);
1239         bond->params.fail_over_mac = newval->value;
1240
1241         return 0;
1242 }
1243
1244 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1245                                             const struct bond_opt_value *newval)
1246 {
1247         netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1248                    newval->string, newval->value);
1249         bond->params.xmit_policy = newval->value;
1250
1251         if (bond->dev->reg_state == NETREG_REGISTERED)
1252                 if (bond_set_tls_features(bond))
1253                         netdev_update_features(bond->dev);
1254
1255         return 0;
1256 }
1257
1258 static int bond_option_resend_igmp_set(struct bonding *bond,
1259                                        const struct bond_opt_value *newval)
1260 {
1261         netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1262                    newval->value);
1263         bond->params.resend_igmp = newval->value;
1264
1265         return 0;
1266 }
1267
1268 static int bond_option_num_peer_notif_set(struct bonding *bond,
1269                                    const struct bond_opt_value *newval)
1270 {
1271         bond->params.num_peer_notif = newval->value;
1272
1273         return 0;
1274 }
1275
1276 static int bond_option_all_slaves_active_set(struct bonding *bond,
1277                                              const struct bond_opt_value *newval)
1278 {
1279         struct list_head *iter;
1280         struct slave *slave;
1281
1282         if (newval->value == bond->params.all_slaves_active)
1283                 return 0;
1284         bond->params.all_slaves_active = newval->value;
1285         bond_for_each_slave(bond, slave, iter) {
1286                 if (!bond_is_active_slave(slave)) {
1287                         if (newval->value)
1288                                 slave->inactive = 0;
1289                         else
1290                                 slave->inactive = 1;
1291                 }
1292         }
1293
1294         return 0;
1295 }
1296
1297 static int bond_option_min_links_set(struct bonding *bond,
1298                                      const struct bond_opt_value *newval)
1299 {
1300         netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1301                    newval->value);
1302         bond->params.min_links = newval->value;
1303         bond_set_carrier(bond);
1304
1305         return 0;
1306 }
1307
1308 static int bond_option_lp_interval_set(struct bonding *bond,
1309                                        const struct bond_opt_value *newval)
1310 {
1311         bond->params.lp_interval = newval->value;
1312
1313         return 0;
1314 }
1315
1316 static int bond_option_pps_set(struct bonding *bond,
1317                                const struct bond_opt_value *newval)
1318 {
1319         netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1320                    newval->value);
1321         bond->params.packets_per_slave = newval->value;
1322         if (newval->value > 0) {
1323                 bond->params.reciprocal_packets_per_slave =
1324                         reciprocal_value(newval->value);
1325         } else {
1326                 /* reciprocal_packets_per_slave is unused if
1327                  * packets_per_slave is 0 or 1, just initialize it
1328                  */
1329                 bond->params.reciprocal_packets_per_slave =
1330                         (struct reciprocal_value) { 0 };
1331         }
1332
1333         return 0;
1334 }
1335
1336 static int bond_option_lacp_rate_set(struct bonding *bond,
1337                                      const struct bond_opt_value *newval)
1338 {
1339         netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1340                    newval->string, newval->value);
1341         bond->params.lacp_fast = newval->value;
1342         bond_3ad_update_lacp_rate(bond);
1343
1344         return 0;
1345 }
1346
1347 static int bond_option_ad_select_set(struct bonding *bond,
1348                                      const struct bond_opt_value *newval)
1349 {
1350         netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1351                    newval->string, newval->value);
1352         bond->params.ad_select = newval->value;
1353
1354         return 0;
1355 }
1356
1357 static int bond_option_queue_id_set(struct bonding *bond,
1358                                     const struct bond_opt_value *newval)
1359 {
1360         struct slave *slave, *update_slave;
1361         struct net_device *sdev;
1362         struct list_head *iter;
1363         char *delim;
1364         int ret = 0;
1365         u16 qid;
1366
1367         /* delim will point to queue id if successful */
1368         delim = strchr(newval->string, ':');
1369         if (!delim)
1370                 goto err_no_cmd;
1371
1372         /* Terminate string that points to device name and bump it
1373          * up one, so we can read the queue id there.
1374          */
1375         *delim = '\0';
1376         if (sscanf(++delim, "%hd\n", &qid) != 1)
1377                 goto err_no_cmd;
1378
1379         /* Check buffer length, valid ifname and queue id */
1380         if (!dev_valid_name(newval->string) ||
1381             qid > bond->dev->real_num_tx_queues)
1382                 goto err_no_cmd;
1383
1384         /* Get the pointer to that interface if it exists */
1385         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1386         if (!sdev)
1387                 goto err_no_cmd;
1388
1389         /* Search for thes slave and check for duplicate qids */
1390         update_slave = NULL;
1391         bond_for_each_slave(bond, slave, iter) {
1392                 if (sdev == slave->dev)
1393                         /* We don't need to check the matching
1394                          * slave for dups, since we're overwriting it
1395                          */
1396                         update_slave = slave;
1397                 else if (qid && qid == slave->queue_id) {
1398                         goto err_no_cmd;
1399                 }
1400         }
1401
1402         if (!update_slave)
1403                 goto err_no_cmd;
1404
1405         /* Actually set the qids for the slave */
1406         update_slave->queue_id = qid;
1407
1408 out:
1409         return ret;
1410
1411 err_no_cmd:
1412         netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1413         ret = -EPERM;
1414         goto out;
1415
1416 }
1417
1418 static int bond_option_slaves_set(struct bonding *bond,
1419                                   const struct bond_opt_value *newval)
1420 {
1421         char command[IFNAMSIZ + 1] = { 0, };
1422         struct net_device *dev;
1423         char *ifname;
1424         int ret;
1425
1426         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1427         ifname = command + 1;
1428         if ((strlen(command) <= 1) ||
1429             (command[0] != '+' && command[0] != '-') ||
1430             !dev_valid_name(ifname))
1431                 goto err_no_cmd;
1432
1433         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1434         if (!dev) {
1435                 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1436                            ifname);
1437                 ret = -ENODEV;
1438                 goto out;
1439         }
1440
1441         switch (command[0]) {
1442         case '+':
1443                 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1444                 ret = bond_enslave(bond->dev, dev, NULL);
1445                 break;
1446
1447         case '-':
1448                 slave_dbg(bond->dev, dev, "Releasing interface\n");
1449                 ret = bond_release(bond->dev, dev);
1450                 break;
1451
1452         default:
1453                 /* should not run here. */
1454                 goto err_no_cmd;
1455         }
1456
1457 out:
1458         return ret;
1459
1460 err_no_cmd:
1461         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1462         ret = -EPERM;
1463         goto out;
1464 }
1465
1466 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1467                                           const struct bond_opt_value *newval)
1468 {
1469         netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1470                    newval->string, newval->value);
1471         bond->params.tlb_dynamic_lb = newval->value;
1472
1473         return 0;
1474 }
1475
1476 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1477                                              const struct bond_opt_value *newval)
1478 {
1479         netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1480                    newval->value);
1481
1482         bond->params.ad_actor_sys_prio = newval->value;
1483         bond_3ad_update_ad_actor_settings(bond);
1484
1485         return 0;
1486 }
1487
1488 static int bond_option_ad_actor_system_set(struct bonding *bond,
1489                                            const struct bond_opt_value *newval)
1490 {
1491         u8 macaddr[ETH_ALEN];
1492         u8 *mac;
1493
1494         if (newval->string) {
1495                 if (!mac_pton(newval->string, macaddr))
1496                         goto err;
1497                 mac = macaddr;
1498         } else {
1499                 mac = (u8 *)&newval->value;
1500         }
1501
1502         if (!is_valid_ether_addr(mac))
1503                 goto err;
1504
1505         netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1506         ether_addr_copy(bond->params.ad_actor_system, mac);
1507         bond_3ad_update_ad_actor_settings(bond);
1508
1509         return 0;
1510
1511 err:
1512         netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1513         return -EINVAL;
1514 }
1515
1516 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1517                                             const struct bond_opt_value *newval)
1518 {
1519         netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1520                    newval->value);
1521
1522         bond->params.ad_user_port_key = newval->value;
1523         return 0;
1524 }